Double eccentric butterfly valve
- name: Double eccentric butterfly valve
- Type: D342X/H
- Presure: 0.6～1.6MPa
- Specifications: DN40~DN4500
- material: HT200、QT450、WCB、CF8、CF8M,etc.
Product description
As the regulation and closure devices using double eccentric butterfly valve, also known as the high performance butterfly valve, mainly used in waterworks, power plants, steel smelting, chemical, water fountain engineering, environmental facilities, etc. the drainage system, especially for the waterway pipe. Compared with the midline butterfly valve, double eccentric butterfly valve is more resistant to high pressure, long life, good stability. Compared with other valves, the smaller the diameter of the material, the lighter, the cost is lower.
Main connection and dimensions(PN10)
nominal diameter
Main dimensions and connection dimensions(mm)
valve size mm
flange connection size mm
L
H1
H
D
D1
D2
b
f
z-Φd
250
165
193
416
395
350
314
26
3
12-Φ22
300
178
244
378
445
400
362
26
4
12-Φ22
350
190
276
505
505
460
422
26
4
16-Φ22
400
216
307
570
565
515
473
26
4
16-Φ26
450
222
332
600
615
565
523
28
4
20-Φ26
500
229
364
640
670
620
578
28
4
20-Φ26
600
267
424
760
780
725
677
34
5
20-Φ30
700
292
484
800
895
840
792
35
5
24-Φ30
800
318
546
878
1015
950
899
38
5
24-Φ33
900
330
605
945
1115
1050
999
38
5
28-Φ33
1000
410
700
1060
1230
1160
1106
44
5
28-Φ36
1200
470
785
1195
1455
1380
1323
55
5
32-Φ39
1400
530
910
1360
1670
1590
1520
65
5
36-Φ42
1600
600
1043
1516
1915
1820
1740
75
5
40-Φ48
1800
670
1128
1660
2115
2020
1940
85
5
44-Φ48
2000
760
1290
1850
2325
2230
2150
90
5
48-Φ48
2200
800
1372
1934
2250
2440
2368
58
5
52-Φ56
2400
900
1535
2046
2760
2650
2564
70
5
56-Φ56
-
Main parts material
material code
Valve body, valve cover
valve plate
valve seat
sealing ring
valve stem
filler
z
HT200 Gray cast iron
Gray cast iron
HT200+Copper / stainless steel
rubber
20Cr13
graphite
Q
QT450 Nodular graphite cast iron
Nodular graphite cast iron
QT450+Copper / stainless steel
rubber
20Cr13
graphite
C
WCB carbon steel
carbon steel
WCB+Copper / stainless steel/Cemented carbide
rubber
20Cr13
graphite
P
CF8 (304 )stainless steel
stainless steel
stainless steel
rubber
304
PTFE
R
CF8M (316) stainless steel
stainless steel
stainless steel
rubber
316
PTFE
PL
CF3 (304 L)stainless steel
stainless steel
stainless steel
rubber
304L
PTFE
RL
CF3M (316L)stainless steel
stainless steel
stainless steel
rubber
316L
PTFE
-
Nickel chromium cast iron
Nickel chromium cast iron
Nickel chromium cast iron+316L
rubber
316L
PTFE
Other special materials, our company can also be tailored to customer needs.
-
Main performance characteristics
Shell material
Applicable medium
Applicable temperature（℃）
Gray cast iron（Z）
Water, air, oil
≤80
Nodular graphite cast iron（Q）
Water, air, oil
≤80
carbon steel（C type）
Water, air, oil
≤80
Ci Ni Ti（P type）
Nitric acid
≤80
Ci Ni Mo Ti Steel（R type）
Nitric acid
≤80
Nickel chromium cast iron
seawater
≤80
Nominal pressure PN（MPa）
shell
Test pressure（MPa）
seal（liqiud）
seal（gas）
0.6
0.9
0.66
0.6
1.0
1.5
1.1
0.6
1.6
2.4
1.8
0.6
2.5
3.8
2.8
0.6
- $Column4$
- $Column5$
